It's... another excellent PWA to run in your Edge browser on Windows 10 Mobile, or pin to your Start screen, as needed. In this case, a rather splendid cross-platform, cross-browser diary application. Log what you do through each day and then look back on a fully-fledged week by week diary in the Cloud. There are social links too, to share your activities with others.
Of course, you can turn this into an 'app' yourself with PAWA or just pin it 'as is' on your Start screen. Or just add it as a 'Favourite'. It's up to you. If you're confused by the different PWA options then check out my feature here.
Here's the PWA app in action:
There's a login process, but it's worth going through, since all your diary entries are then in the Cloud and if you lose your phone then it's all safe, etc! (right) Plenty of settings and things to fiddle with in the interface.
Getting going with 'microjournaling'(!) - the idea of jotting stuff down as you go does appeal - since by the end of a day most of us are too tired or too forgetful to record much!!